Radiation fins



Aug- 27, 195i R. PINTARELLI 2,804,286

RADIATION FINS Filed March 18, 1955 United States PatentOiiice 2,804,286Patented Aug. 27, 195,7

RADIATION FINS Ralph Pintarelli, Johnston, R. I.

Application March 18, 1955, Serial No. 495,209

1 Claim. (Cl. 257-262.16)

This invention relates generally to heating systems and moreparticularly to radiation iins for use with heating conduits.

- In heating systems where the heating medium is carried by a conduitand the heat is exchanged directly from said conduit, it is of vitalimportance that the heat be rapidly and eiliciently carried away fromthe conduit for dissemination to the area to be heated. Thus in roomswhere the conduit extends within a baseboard enclosure, for example, itis necessary that steps be taken to keep the heat from stagnatingadjacent the baseboard area. The prior art has partially solved thisproblem by the use of radiation fins of heat conducting material,mounted on the conduit in closely spaced relation. Although theradiation tins heretofore employed have greatly aided in the carryingoff of heat from the conduit, there, nevertheless, still remains arelatively high degree of heat stagnation in the conduit area.

Accordingly, a primary object of this invention is the provision ofnovel and improved radiation tins which will result in a maximum of heattransfer from the conduit with which they are associated.

Another object is the provision of novel and improved radiation tinswhich will disseminate the heat with a relatively high degree ofrapidity.

Still another object is the provision of radiation ns having meansthereon for venting and otherwise providing impetus to the heated airadjacent the conduit in order to impel said heated air away from theconduit area.

A further object is the provision of radiation fins having novel andimproved means for mounting on a i conduit.

A still further object is the provision of novel and improved mountingmeans for radiation tins wherein said mounting means additionally aid inthe achievement of maximum heat transfer.

Another object is the provision of novel and improved radiation linswhich are simple to install, durable in use, and economically feasibleto manufacture.

Other objects, features and advantages of the invention will becomeapparent as the description thereof proceeds when considered inconnection with the accompanying illustrative drawings.

In the drawings which illustrate the best mode presently contemplated byme for carrying out my invention:

Fig. l is a side elevation of a conduit having a plurality of my noveland improved radiation lins mounted thereon;

Fig. 2 is a perspective view of my novel and improved radiation iin; and

Fig. 3 is a top edge view thereof.

Referring to the drawings, and more particularly to Fig. l thereof, aheat carrying conduit is shown at 10. The heating medium carried byconduit may be of any known type, such as, for example, hot Water orsteam. A plurality of radiation tins 12 of any known heat conductivematerial, preferably copper, are mounted on the conduit 10 in spacedrelation in order to aid in the carrying away and dispersement of heatfrom the conduit in a manner now to be described.

Each tin 12 (note Fig. 2) is of substantially rectangular configurationand has a top edge 14 and a bottom edge 16. The iin 12 is furtherprovided with a circular aperture 18 located adjacent the bottom edge16. Surrounding the aperture 18 are a plurality of dished projections20, the functions of which will hereinafter be made apparent. Theprojections 20 are of substantially cup-shape coniiguration and eachsuccessive projection extends in an alternate direction.

Located above the aperture 18 is a series of additional dishedprojections 22, also of substantially cup-shape configuration. Theprojections 22 extend through an arcuate path and at their upperextremities define openings 24. Adjacent the upper edge 14 there isstill another series of dished, cup-shape projections 26, defining attheir upper portions openings 2S. It will be noted that each of theprojections 24 are dished in the opposite direction from that of theprojections 26.

Integrally struck from diametrically opposed corners of the fin 12 arespacer legs 30, each of which tapers outwardly toward its free end. Itwill be understood that the legs 30 serve to keep the tins 12 properlyspaced when a plurality of the tins are mounted on a conduit, as shownmost clearly in Fig. 1.

In mounting the iins for use, the apertures 18 will snugly encompass theconduit 10, and the oppositely disposed projection 20 will providesupporting means for preventing canting of the tins. At the same time,the particular dished, cup-shape conliguration of the projections 20serves to provide a venting action on the hot air currents. This actionis of great importance since it aids in the reduction of stagnation ofthe heat at the very area where it is most likely to occur, namely,adjacent the conduit. Thus the projections 20 not only simplify themounting of the fins on the conduit by eliminating use of collars,spring ingers and the like as heretofore employed, but they additionallyaid in the dissemination of the heat.

Due to the fact that the natural tendency of the heat is to rise, theaperture 1S of lin 12 is located near the lower edge 16 thereof, wherebythe major portion of the n is in the path of the heat ow. Theprojections 22 and 26 also serve to reduce stagnation of the heatbetween the yfins by venting and otherwise inciting ow of the heatedair. The fact that the elements 22 and 26 project from opposite sides ofthe tins aids in the more effective dissemination of the heated airwhile the openings 24 and 28 enable the heat to intersperse fromopposite sides of any respective tin, thereby contributing to greatercirculation thereof and hence to a more efficient heat transfer andexchange.

The spacer legs 30 form no part of the instant invention. It will benoted, however, that by use of the tapered construction shown anddescribed, there will be no tendency for a plurality of the fins 12 tonest.

In use, radiation tins employing the aforedescribed construction haveproven to be exceptionally effective. Tests have shown that by spacingthese tins every half inch on the conduit, as much if not more heat willbe disseminated and at a much more rapid rate than where prior art tinsare mounted every quarter inch or closer. Thus it will be seen thatthere is provided in accordance with this invention radiation iinscomprising certain novel and inventive structural features whichcooperate to provide an improved and more ecient heating system.

While there is shown and described herein certain specific structuresembodying the invention it will be manifest to those skilled in the artthat various modications and rearrangements of the parts may be madewithout departingfrom the spirit and scope of the underlying inventiveconcept` and that the same isvnot limited ytonthe y aperture beinglocated on the llc'mgitudinal centerline of projections formed in saidmajor portion of the tin, some ,of Vsaid additional projectionsextending from one side of saidtn, and others 'e'tending from the otherside thereof, said additional projections eachhaving an opening at its 5upper extremity.

References Cited in the iile of this patent UNITED STATES PATENTS1,797,535 Trane Mar. 24, 1931 1,873,052 Seward Aug. 23,` `1932 2,217,469Clarke Oct. 8, 1940 2,696,976 Boestad et al Dec. 14, 1954 y FOREIGNPATENTS 33,595 Franc July 3, 1928 (Addition to No. 603,073) 72,371Austria Sept. l1, 1916

